The Blizzard End User License Agreement explains what you may and may not do with a Blizzard account. This article highlights a few passages from the EULA that are most relevant to this policy.

Troubleshooting steps for performance problems

Troubleshooting steps for crash problems

A guide on running a traceroute on Windows and Mac.

Instructions for troubleshooting your network to allow Blizzard services to work properly.

How to run a pathping on Windows and Mac.

The code of conduct for Blizzard Entertainment forums